const (TailscaleServiceIPString   = "100.100.100.100"TailscaleServiceIPv6String = "fd7a:115c:a1e0::53")

funcAllIPv4¶added inv1.24.0

func AllIPv4()netip.Prefix

AllIPv4 returns 0.0.0.0/0.

funcAllIPv6¶added inv1.24.0

func AllIPv6()netip.Prefix

AllIPv6 returns ::/0.

funcCGNATRange¶

func CGNATRange()netip.Prefix

CGNATRange returns the Carrier Grade NAT address range thatis the superset range that Tailscale assigns out of.Seehttps://tailscale.com/s/cgnatNote that Tailscale does not assign out of the ChromeOSVMRange.

funcChromeOSVMRange¶

func ChromeOSVMRange()netip.Prefix

ChromeOSVMRange returns the subset of the CGNAT IPv4 range used byChromeOS to interconnect the host OS to containers and VMs. Weavoid allocating Tailscale IPs from it, to avoid conflicts.

funcContainsExitRoute¶added inv1.76.0

func ContainsExitRoute(rrviews.Slice[netip.Prefix])bool

ContainsExitRoute reports whether rr contains at least one of IPv4 orIPv6 /0 (exit) routes.

funcContainsExitRoutes¶added inv1.24.0

func ContainsExitRoutes(rrviews.Slice[netip.Prefix])bool

ContainsExitRoutes reports whether rr contains both the IPv4 andIPv6 /0 route.

funcContainsNonExitSubnetRoutes¶added inv1.50.0

func ContainsNonExitSubnetRoutes(rrviews.Slice[netip.Prefix])bool

ContainsNonExitSubnetRoutes reports whether v contains SubnetRoutes other than ExitNode Routes.

funcExitRoutes¶added inv1.24.0

func ExitRoutes() []netip.Prefix

ExitRoutes returns a slice containing AllIPv4 and AllIPv6.

funcFilterPrefixesCopy¶added inv1.24.0

func FilterPrefixesCopy(inviews.Slice[netip.Prefix], f func(netip.Prefix)bool) []netip.Prefix

FilterPrefixes returns a new slice, not aliasing in, containing elements ofin that match f.

funcIsExitRoute¶added inv1.76.0

func IsExitRoute(pnetip.Prefix)bool

IsExitRoute reports whether p is an exit node route.

funcIsTailscaleIP¶

func IsTailscaleIP(ipnetip.Addr)bool

IsTailscaleIP reports whether IP is an IP address in a range thatTailscale assigns from.

funcIsTailscaleIPv4¶added inv1.78.0

func IsTailscaleIPv4(ipnetip.Addr)bool

IsTailscaleIPv4 reports whether an IPv4 IP is an IP address thatTailscale assigns from.

funcIsViaPrefix¶added inv1.24.0

func IsViaPrefix(pnetip.Prefix)bool

IsViaPrefix reports whether p is a CIDR in the Tailscale "via" range.See TailscaleViaRange.

funcMapVia¶added inv1.24.0

func MapVia(siteIDuint32, v4netip.Prefix) (vianetip.Prefix, errerror)

MapVia returns an IPv6 "via" route for an IPv4 CIDR in a given siteID.

funcPrefixIs4¶added inv1.16.0

func PrefixIs4(pnetip.Prefix)bool

PrefixIs4 reports whether p is an IPv4 prefix.

funcPrefixIs6¶added inv1.16.0

func PrefixIs6(pnetip.Prefix)bool

PrefixIs6 reports whether p is an IPv6 prefix.

funcPrefixesContainsIP¶added inv1.20.0

func PrefixesContainsIP(ipp []netip.Prefix, ipnetip.Addr)bool

PrefixesContainsIP reports whether any prefix in ipp contains ip.

funcSortPrefixes¶added inv1.34.0

func SortPrefixes(p []netip.Prefix)

SortPrefixes sorts the prefixes in place.

funcTailscale4To6¶added inv1.2.0

func Tailscale4To6(ipv4netip.Addr)netip.Addr

Tailscale4To6 returns a Tailscale IPv6 address that maps 1:1 to thegiven Tailscale IPv4 address. Returns a zero IP if ipv4 isn't aTailscale IPv4 address.

funcTailscale4To6Placeholder¶added inv1.6.0

func Tailscale4To6Placeholder()netip.Addr

Tailscale4To6Placeholder returns an IP address that can be used asa source IP when one is required, but a netmap didn't provideany. This address never gets allocated by the 4-to-6 algorithm incontrol.

Currently used to work around a Windows limitation when programmingIPv6 routes in corner cases.

funcTailscale4To6Range¶added inv1.2.0

func Tailscale4To6Range()netip.Prefix

Tailscale4To6Range returns the subset of TailscaleULARange used forauto-translated Tailscale ipv4 addresses.

funcTailscale6to4¶added inv1.24.0

func Tailscale6to4(ipv6netip.Addr) (netip.Addr,bool)

Tailscale6to4 returns the IPv4 address corresponding to the giventailscale IPv6 address within the 4To6 range. The IPv4 addressand true are returned if the given address was in the correct range,false if not.

funcTailscaleEphemeral6Range¶added inv1.8.0

func TailscaleEphemeral6Range()netip.Prefix

TailscaleEphemeral6Range returns the subset of TailscaleULARangeused for ephemeral IPv6-only Tailscale nodes.

funcTailscaleServiceIP¶added inv1.0.1

func TailscaleServiceIP()netip.Addr

TailscaleServiceIP returns the IPv4 listen address of servicesprovided by Tailscale itself such as the MagicDNS proxy.

For IPv6, use TailscaleServiceIPv6.

funcTailscaleServiceIPv6¶added inv1.20.0

func TailscaleServiceIPv6()netip.Addr

TailscaleServiceIPv6 returns the IPv6 listen address of the servicesprovided by Tailscale itself such as the MagicDNS proxy.

For IPv4, use TailscaleServiceIP.

funcTailscaleULARange¶added inv1.2.0

func TailscaleULARange()netip.Prefix

TailscaleULARange returns the IPv6 Unique Local Address range thatis the superset range that Tailscale assigns out of.

funcTailscaleViaRange¶added inv1.24.0

func TailscaleViaRange()netip.Prefix

TailscaleViaRange returns the IPv6 Unique Local Address subset rangeTailscaleULARange that's used for IPv4 tunneling via IPv6.

funcUnmapVia¶added inv1.24.0

func UnmapVia(ipnetip.Addr)netip.Addr

UnmapVia returns the IPv4 address that corresponds to the provided Tailscale"via" IPv4-in-IPv6 address.

If ip is not a via address, it returns ip unchanged.

funcWithoutExitRoute¶added inv1.76.0

func WithoutExitRoute(rrviews.Slice[netip.Prefix])views.Slice[netip.Prefix]

WithoutExitRoute returns rr unchanged if it has 0 /0routes. If it has a IPv4 or IPv6 /0 routes, then it returnsa copy with all /0 routes removed.

funcWithoutExitRoutes¶added inv1.76.0

func WithoutExitRoutes(rrviews.Slice[netip.Prefix])views.Slice[netip.Prefix]

WithoutExitRoutes returns rr unchanged if it has only 1 or 0 /0routes. If it has both IPv4 and IPv6 /0 routes, then it returnsa copy with all /0 routes removed.